Grease-pump.



C. F. ATTWOUD.

GREASE PUMP.

APPLICATION FILED Nov. s, I9I1.

Patented Feb. 25, 1919.

y ard 7 by passing the lower end of the barrel uric.

CHARLES F. ATTWOOD, 0F GRAND APIDS, MICHIGAN.

GREASE-PUMP.

Specification of Letters Patent.

Patented Feb. 25, 1919.

Application led'November 8, 1917.- Serial No. 200,988.

To all who/n t may concern.:

Be it known that I, CHARLES F. A'.i'rwoon, a citizen ot the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Grease- Iumps, of which the following is a specification.

My invention relates t0 improvements in pumps for handling heavy greases, and its objects are: first, to provide a means whereby the pump barrel will be completely filled with each upward stroke of the plunger, and the entire amount from the pump with each down stroke of the plunger; second, to wholly dispense with y the use of valves in pump construction, and, third, to so construct my pump that it may be readily assembled or taken apart.

I attain these objects by the mechanism, construction and assemblage of parts shown in the accompanying' drawing, in which Figure 1 is an elevation of my pump and a part of the oil or grease tank, showing the pump and tank cut away at the connecting point to disclose the construction of the inlet and outlet of the pump. Fig. 2 is an elevation of the barrel of my pump' disconnected from the standard. Fig. 3 is a transverse vertical section of the same showing the construction of the plunger. Fig. t is a plan of the pump indicating'how the position or the intake opening, or outflow opening may be determined. Fig. 5 shows the manner of connecting the pump barrel tothe pump standard so the barrel may be adjusted to carry the grease opening into intake or outflow position. Figs. (5 and 7 show means for applying a drain pipe.

Similar numerals refer to similar parts throughout the several views.

In the accompanying drawing l represents the oil or grease tank, which is of ordinary construction. is my pump barrel which is connected with the pump standdownward through` or into rthe standard until the collar 11 rest-s upon the upper end of the standard. I then place the nut or bur 6 over the collar 11 and screw it onto the standard, as indicated in Fig. 5. so that a grease tight joint. is formed, but the barrel may be readily revolved to change the position. of the intake opening 9 from the inflow pipe 8 around to the outflow pipe 10` as inwill be discharged tlli'catil by the dott-ed line at the right ofiig.

The lower end of the pump barrel 2 is closed as at 2 to t'orm an oil tight 'bottonr to the barrel so that any and all grease taken into the barrel `2 upon Ythe upward movement of the plunger 12 with the port 8 opening into the barrel, must, when the barrel is turned around into position to close the port 8, and open the port into 10, then pressing the plunger downward, pass outward. through the outflow tube 10.

The barrel 2 is made with an opening 9 through one side near the bottoni or lower end of the barrel which is so positioned that when desiring to draw grease from the main tank l into the pump barrel, the opening from the tank to the barrel is full and clear with no obstruction, while the opening to the outflow vtube l0 is closed, and when the barrel is revolved around into yposition tov discharge its contents through the discharge tube the opening from the tank is entirely closed. By this construction I am enabled to dispense with the use of valves or other obstructing'elements in the path of the infiowing, or the outilowing grease,.thus enabling me to handle the heaviest lubricating greases without danger of short-measuring the grease as it passes through the pump and out at the opening indicated-by the dotted lines 9. y

I provide for easily revolving the puinp barrel by using a square rod for the plunger rod, as indicated at 4 in Figs. l and 3, which passes through a-square opening in the top 5, so that the entire pump barrel must revolve with the handle 3, and to indicate the position of the intake opening 9 I place some available symbol, as the arrow shown in Fig. 4, in such position and place that it will always indicate` positively., the exact posi. tion of the said opening. The lower end of the plunger rod @may` in fact should pass far enough belowl the plunger l2 as at 4f to prevent the plunger from closing any part of the opening in its lowest position, as indicated in Fig'. 3.

In Fig. 6 I- have shown an auxiliary barrel 13 that is secured to 'the standard 7 the same as the barrel .2 is secured in Figs. 1 and 5. I provide this vbarrel with openings 8 and 10 that correspond with the openings 8 and 10 in the standard 7. This auxiliary barrel is used, simply, as a support for the 9 when the plunger is y pump barrel 2, and is not only not essential to the proper working of the pump but adds to the cost ofl production, hence I prefer the construction shown inFig. 1. At la I have 5 shown a brace that is connected at one end rwith the grease tank 1, and at the other end with the up er end of the pum barrel. In Fig. l this f ace is shown 1n tie form of a tube, as at 11', and is securely connected at one end, with a band 13 that is made to encircle the pump barrel 2 so the pump barrel may be readily .revolved therein. In Fig. 6 the brace 14 is secured to the auxiliary barrel 13, and in both instances it may be in 15 the forni of un overflow tube or pipethrouffh the top of the pump barrel, the barrel 2 be]- which any oil that may be forced by tie plunger 12 may tlow into the tank 1 and thus avert the danger of the grease being forced onto the pump handle or smearing .ing provided with an opening 15 into' said pipe. i ,l l

IVhen using the auxiliary barrel 13 I provide for averting the danger of drawing the pump barrel upward with the upward movement of the plunger 12,/ by placing a flange 2 -upon the lower end of the pump barrel, that will project outward the thickness of the auxiliary barrel 'and arranged t0 revolve' freely thereunder, with the 'pump openinrrs near the lower end directly opposite eac i other, said standard screw threaded on the outer surface at the upper end, a screw threaded open nut arranged to screw onto theend of the standard and form a chamber A between the end of the standard and the end olf the nut, a barrel passing through thenut and into the standard, and having an opening ythrough one side registerable with 'the lateral openings in the standard, a collar around said barrel supported in the chainber at the end :of the standard, a vertically movable plunger and plunger rod in theliarF rel, and means for imparting a revoluble movement to the barrel and the plunger rod.

Q. In a grease pump, a standard havingan inlow opening and an outflow' opening on opposite sides, a barrel having the lower end closed and having an opening through one side alined with the openings in the standard, a flange around the barrel in position to engage the end of the standard, a nut fitted to ass over said anoe and be screwed upon the upper end of the standard, aplunger, a square plunger rod, a cap on the barrel having a square opening for the passage of the plunger rod arranged to revolve the barrel with 'the plunger rod, and means for indicating the position of the side opening in the barrel. v

Signed at Grand Rapids, Michigan, November 5, 1917. l l

o'i-iARLE-s n. ATTWoon. 

